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Extraction of the fire with a lighter

What just not ready for a quirky mind of a man trying to survive in danger conditions! Today we will talk about one of the most sophisticated ways to get the fire - the lens. This method is primarily the fact that it works! Bad - the fact that for this method must be a bright sun, and the presence of the lens, or the possibility of something to replace. And despite the narrowness of the above-mentioned conditions, do not neglect this technique.

The principle of the method of ignition of fire lens, based on the concentration of the beam of solar energy in highly combustible material. The beam is concentrated at the singular point, the so-called focus of the lens - there arises the maximum energy and temperature. This allows a temperature sufficient to ignite the material, which is hovering over the lens. Thus here, everything is simple and beautiful as herself in Physics)

Thus, it is necessary to build a fire. No matches, lighters, flint ... There is the sun! The bright sun and the sky cloudless. Well, the conditions are favorable. It remains to find the lens.

The lenses are different. Collecting and dispersing. What we need is just collecting lens or the so-called Fresnel lens. Well, if you have a broken pair of binoculars or a scope (a parse is not necessary - it may be useful for the purpose), or other optical device - there certainly is a collecting lens.

Lens can be made from conventional lens glasses, sticking their internal stakeholders (eg with tar or similar natural glue). The air gap between the two halves must be filled with water to seal the optical environment and make a seam-sealed pasting. Here you have a great lens for kindling the fire!

As the lens can be used by any package as a condom or something like that, filled with water. The main thing that was convex, transparent, and that the medium had a higher optical density.

 

 

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